A personal, guided tour to the best scoops and stories every day in The Wall Street Journal, from Editor in Chief Gerard Baker.

A computer virus linked to Israeli spies infiltrated three hotels hosting nuclear talks between Iran and world powers, a cybersecurity firm has found. The discovery sheds new light on the use of stealthy malware in spying efforts. The revelations could also provide what may be the first concrete evidence that the talks were targeted and by whom. Senior U.S. officials learned that Israel was spying on the negotiations in 2014, a finding first reported by the Journal in March. Meanwhile, just...